Generic EMC standard - immunity in industrial environments; 61000-4-x methods with test levels and A/B/C performance criteria.
A generic standard specifying EMC immunity requirements for electrical and electronic equipment operating in industrial environments over the range 0 Hz–400 GHz. An industrial environment is characterised by a dedicated power network supplied from an HV/MV transformer, numerous interconnected devices operating simultaneously, frequent switching of large inductive or capacitive loads, high currents and associated magnetic fields, and the presence of high-power ISM equipment.
The standard does not itself describe the test methods: it lists phenomena, references IEC 61000-4-x basic standards as the methods, and assigns a test level and performance criterion for each equipment port (enclosure, signal ports, DC power, AC power).
The standard applies when no product or product-family EMC standard exists; in that case, a declaration of conformity with EN IEC 61000-6-2 provides a complete set of immunity requirements and can support immunity assessment under EMC Directive 2014/30/EU.
A reference to “EN 61000-6-2” in a data sheet means declaration of conformity with a set of levels, while “IEC 61000-4-x” identifies only the test method used. For rolling stock and railway infrastructure, product standards in the EN 50121 series take precedence over the generic standard.
The standard defines three performance criteria: A – the equipment operates as intended during and after the test, without degradation or loss of function; B – the equipment operates as intended after the test, while degradation during the test is permitted but without a change of operating state or stored data; C – temporary loss of function during the test is permitted if the function is restored automatically or by operation of controls.
Requirements are set out in Tables 1–4 by port: enclosure, signal and control ports, DC power ports and AC power ports. Tests are performed according to the referenced basic standards; the standard does not require testing at frequencies for which it specifies no requirements.
If a data sheet states “EN 61000-6-2”, the component declares immunity at the industrial-environment levels listed above; check whether the data sheet also states performance criteria for the individual tests. For installation on rolling stock, compare these levels with EN 50121-3-2, which for ESD requires ±6 kV contact / ±8 kV air and for RF fields 20 V/m in the 80–1000 MHz range, i.e. more than the generic industrial standard.
